Based on the basic framework of China’s sustainable development evaluation index system，the report comprehensively and systematically analyzes and ranks the sustainable development of China’s national，provincial and large and medium-sized cities in 2020. The research shows that：From a national perspective，from 2015 to 2020，the overall development level of sustainable development in China has been continuously optimized，the economic strength has jumped significantly，the social and people’s livelihood has been effectively improved，the overall situation of resources and the environment has improved significantly，and the effect of governance and protection has gradually become prominent. In the face of the epidemic in 2020，China’s sustainable development still shows strong resilience，but overall，China still has shortcomings in resources，environment and governance and protection，and it is necessary to further improve the level of governance. From the perspective of provinces，autonomous regions and municipalities directly under the Central Government，the top 10 are Beijing，Shanghai，Zhejiang，Guangdong，Chongqing，Fujian，Tianjin，Jiangsu，Yunnan and Hainan. Provinces and cities in the eastern region still lead sustainable development. In the western region，Chongqing rose to fifth place，Yunnan and Hainan provinces ranked in the top ten，and the central region did not enter the top 10 provinces. The data verification analysis of the sustainable development indicator system of 101 large and medium cities shows that：Hangzhou，Nanjing，Zhuhai，Wuxi，Beijing，Qingdao，Shanghai，Guangzhou，Changsha，Jinan. Hangzhou ranked first in the comprehensive ranking of urban sustainable development. The most economically developed Yangtze River Delta，Pearl River Delta and the capital metropolitan area still have a relatively high comprehensive level of urban sustainable development. The report believes that to continue to improve the level of sustainable development in China，we must actively promote the implementation of the “Global Development Initiative”，and promote the implementation of the 2030 Agenda for Sustainable Development with high quality；solidly promote common prosperity and consolidate the driving force for high-quality development；Goal，accelerate the transformation of the economy and society to a green and low-carbon；accelerate the development of the digital economy to help build a modern industrial system；adhere to the people’s health as the center，and promote the high-quality development of health care.